INTRODUCTION - Section 1
1-4 MTS-3000 OPERATION AND REFERENCE MANUAL
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The instrument case must always be effectively grounded. The rear panel grounding stud of the Control
Module, CM, must be connected by a minimum 12-gauge wire to a known secure ground. This ground is
in addition to the power cord ground.
All leads and connectors must be in good condition and rated for the voltage and current carrying
requirements. Current outputs must be securely connected with a minimum 12 gauge leads with C-hook
terminals.
MTS outputs must not be connected to live outputs or to live equipment. All outputs must be turned off
before making any changes to the connections. Never exceed the following maximum ratings:
(a) 300V rms to ground on any input, power or control.
(b) 300VDC differential to the contact (external trigger) inputs.
(c) 5Arms or 5A DC through any contact output.
All rear panel fuses must contain properly rated fuses.
1.6 TECHNICAL CONSIDERATIONS
The optional DC current source, when enabled, will source up to 2.5A of DC current out of the two left
terminals of Input 1 of the DIGITAL I/O module. The low impedance nature of this source could provide
the necessary trip path to inadvertently trip an auxillary relay or circuit breaker. The DC current output
only should be used when the protective relays trip output circuit is properly isolated.
1.7 TECHNICAL SUPPORT
The design of the MTS reflects decades of experience in the electric power industry. However, we
recognize that situations may be encountered that were not considered during its design. We encourage
you to forward any questions, problems or suggestions to us either through the representative from whom
you purchased your system, or directly to us via the phone, fax or e-mail numbers found on the front
cover.
